Musannaf Ibn Abi Shaybah

Hazrat Wa'il bin Hujr says that I prayed behind the Noble Prophet (peace and blessings be upon him). When he recited Surah Al-Fatihah, he said "Ameen" aloud, and at the end of the prayer, he turned to the right and to the left for salam until the whiteness of his blessed cheeks became visible.